Aman goes to his office by car at the speed of 80 km/hr and reaches 10 minutes earlier. If he goes at the speed 30 km/hr, then he reaches 10 minutes late. What will be the speed of the car to reach on time?
1
480/11 km/hr
2
240/6 km/hr
3
450/7 km/hr
4
480/13 km/hr